基于气凝胶的微观结构特点,建立了开孔蜂窝纳米空隙结构模型,分别针对方形和圆形截面推导出结构各部分热流,并由傅立叶定律得到其总的热流.结合固相导热,气相导热和辐射热传导,最终得到气凝胶总的等效导热率,并将计算结果与文献进行对比.结果表明,本文的结构模型与实验结果有较好的一致性.
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